The Madness Songfacts explains the song was inspired by an incident when a humbled Matt Bellamy had to go cap in hand to Goldie Hawn's house, after having a fight with his girlfriend Kate Hudson.
I, I can't get these memories out of my mind
And some kind of madness has started to evolve
I, I tried so hard to let you go
But some kind of madness is swallowing me whole, yeah